Check domain traffic data (from registrar):

Buy domain in Dynadot:

Buy domain in Sedo:

Letterdomains.top is memorable and cheap 13 letter premium domain name still available!
The available thirteen letter domain name "letterdomains" is suitable to build letterdomains websites.
The keyword "letterdomains" is made of thirteen characters (13 symbols).
Domains TLD "top" is great to build website for top.
Domain letterdomains.top is not an IDN.